Three coat plastering corner support



FIG. 1 is a perspective view of the three coat plastering corner support showing my new design taken from the back of the three coat plastering corner support;

FIG. 2 is a side elevational view thereof;

FIG. 3 is the opposite side elevational view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a three coat plastering corner support, as shown. 